Check valve for compressors and the like



1930. F. D. PELTIER CHECK VALVE FOR COMPRESSORS AND THE LIKE Filed Dec. 1, 1926 75 TR I Patented Oct. 28, 1930- UNITED STATESv PATENT OFFICE FRANK DESNOYERS PEL'IIER, 0F EVANSVILLE, INDIANA, ASSIGNOR, BY. MESN'E ASSIGNMENTS, '10 SERVEL, INC., 013' NEW YORK, N. Y., A CORPORATION 01' DELA- WARE CHICK VALVE FOR COMPBESSORS AND THE LIKE Application filed December 1, 1926. semi no. 151,879.

My invention relates to flow of fluids and more particularly to compressors and still more particularly my invention relates to compressors for use in the art of mechanical refrigeration, particularly in systems wherein a certain amount of lubricant is circulated along with the refrigerant.

In refrigerating systems wherein the lubricant passes through the system from the compressor to the evaporator and back againto the compressor it is necessary to provide means to prevent pocketing of lubricant in parts of the compressor. My invention consists in a novel means for accomplishing this result. V M invention includes also a novel type of chec valve. v My invention will be describedlwith reference to the accompanying drawing on which: Fi e '1 shows a'compressor in section embo ying my invention; andl ig ure 2- is a cross sectional view of my improved check valve constituting a part o:E"the apparatus shown in Figure 1.

The compressor shown in Figure 1 comprises a crank case chamber 26 formed within a crank case 27. The crank shaft 28 is situatedin part within crank case chamber 26 and carries connecting rods 29. At the lower end of each connecting rod is a connecting rod bearing 30. .The crank shaft is supported in bearings 31 and 32 carried in the crank case. These bearings are lubricated b splashing of oil within the crank case. 0 the u per end of each connecting rod is connecte a piston 24. The pistons are mounted to slide .within cylinders 23. Cylinders 23 are fitted into cylinder housing 33. A chamber 20 is formed within cylinder housing 33 and surrounding in part cylinders 23. Cut into the side of each cylinder 23 is a series of intake ports 21. These ports are situated above the bottom of chamber 20 so that the lower part of chamber 20 would constitute a collecting receptacle for liquid except for means provided to prevent accumulation of liquid therein more fully hereinafter described.

Conduit 22 is the compressor suction line which, when the compressor is used m a re- 26. This communication 38 is tapped to receive a member 10 which constitutesa check valve. Check valve 10 has an upper threaded endll adapted to be screwed into communication 38. Check valve 10 is in the form of a V and contains a passageway through the same comprising angularly disposed passageways 12 and 14. Passageway 12 extends downwardly from the upper opening 13 which is adapted to communicate with chamber 20 and ends internally of the structure forming the check valve at a distance from the bottom where it communicates with passageway 14 which, as will be seen from the drawing, extends upwardly from the bottom of passageway 12 at an angle of about 45 to a chamber 9 which is an enlarged outer end.

26. Check valve 10 is drilled to accommodate a retaining pin 18 situated near opening 19. the purpose of which is to preventv the loss of ball 16 from chamber 9.

Asliquid collects in chamber 20 it forms a head acting against ball 16. The column of liquid in chamber 20 exerts pressure'tending to lift the ball 16 from its seat 15' and when the head is sufiicient to lift the ball 16 lubricant in passageway 14 immediately below ball 16 will flow past ball 16, into chamber 9 and thence into the crank case chamber 26. The lubricant is thus returned from chamber 20 to the crank case chamber and pocketing of lubricant is prevented. It will be noted that the lowermost portion of valve seat 15 is substantially horizontal and constitutes a substantially horizontal groove in which ball 16 may roll as it lifts away from seat 15. It is thus nottnecessary for the column of liquid in chamber 20 and passageway 12 to lift the entire weight of the ball 16 in order to uncover valve seat 15 since the greater portion of Weight of the ball 16 may be said to rest upon the lower side of valve seat 15 and the ball rolls away from its closing position instead of being lifted bodily. Thus the passage of lubricant from chamber. 20 to the crank case chamber 26 is solely dependent upon gravit and is not dependent upon a temporary ifference of pressure in chambers 20 and 26. It takes but a small force to move ball 16.

The check valve is of such construction that oil cannot flow through it from crank case chamber 26 to chamber 20 as a tendency toward such passage forces ball 16 against seat 15 thereby sealing the communication between the two chambers through the check valve.

While I have described one form of my invention it is to be understood that other forms are possible within the spirit and scope of the invention.

Having thus described my invention, what I claim is:

A check valve comprising a casing comprising a V-shaped passageway, a seat in one branch and a ball adapted to fit against said seat and roll substantially horizontally on said seat when the other branch is arran ed vertically, said first mentioned branch havin an outlet openin above said ball and sai second -mentionec l branch having an inlet opening above said outlet opening.

In testimony whereof I hereunto aflix my signature.

FRANK DESNOYERS PELTIER.

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